Elevating platform for trucks



Paten@ .im 21, 1927.

vMT1-:NT OFFICE.

'nant nxononn, or nnnvnn, comme,

`aen conm, or mmm comme, a

ASSIGNOB T DENVER ICE & COL) STOR- CORPORATION OF COLORADO.

nnnva'rme rnafrronu non Tnucxs.-

animation mea :une 11, 192s. sum1 No. 115,228.

This invention relates to a device for ele- Y vating Amaterial from the body of a truck, yand more particularly applicable for use inicingrefrigeratnr cars when the cars are Y not convenient'to the icing dock of theice p ant; .1 ,The device will transport a load of ice to a adjacent the car and elevate the` cakesabove lthe car roof, from y' which position, they may be slid byl gravity v1,0 into the icin'gdoors.

' l "The'inventlon is, o f course Vnot limitedto `u se'but will be valuable orany use where it is desired to load or unload Aa truck from or to anelevated position.

to 11p1-ovule a evice of thischaracter which w' not interfere with the usual loading of the vtruck and which will elevate a portion of the load to 'a comparatively high elevation by means of a relatively small movement of a hydraulic ram. VAnother object ofthe invention is to so construct the device that, when in the foldf ed position, it will occupy a minimum of h space so that it will not interfere with the truck -paing through the usual necessary spaces such as doois and the like. -A further o ject is'v to provide a device which will be entirely enclosedby the truck 3o ld' and will have no projections'beyond e y Y Y Other objects and advantages reside inthe detail construction of the invention, which Vis designed .for-simplicity, economy andei ciency. These-will become more apparent from the following descri tion.

ln the following de ed description of the invention, reference is hadto the accompany'inl drawings which form a part hereof. e numerals refer to like parts in all views of the drawings and hroughout the description.

In the drawings: y Fig. 1 is a side elevationlof a portion of an automobile truck with the invention in place thereon. In this view, one side of the 'truck body has been broken away to disclose the mechanism and in broken line in this la partially elevated' The princi Val object of the invention is view the elevatingplatform is illustrated in position. The system of sheaves and cables illustrated in this elevation is an exact repetition of asimilar system of sheaves and cables upon the opposite side' of the truck.A

Fig. -2 is a plan view of the inventionapplied to a truck.

Fig. `3isa detail front elevationof the operating ram. l

In the drawin s, the truck chassis is illus'- trated at 10 wit cross sills 11 supporting th) ior 13 of a truck-body 12 and operators ca Normally in alignment with the 11001113,

is an elevating platform 15. The platform 15 is carried on a trl'i 16 from an inner angle iron frame 17. This inner frame 17 is vertically slidable in :i similar secondary frame 18, which is alsov vertically slidable in an outer stationary frame 19. The sta,- tionary frame 19 is carried by the chassis 10 on-angle bars 20 and project therebelow,'as shown in Fig. 1. The three frames 17, 18 and 19, each consist of four vertical angle iron posts connected by suitable bracing.

At each corner the nested within each Fig. 2.

etween the hydraulic ram 21 1s carried. This ram is of any of the usual constructions employed in self-dumping trucks and is operated vfrom the truck engine and a pressure pump (not shown) through a pressure line 22. The Vpiston rod of the ram, illustrated at 23, carries a T-head 24, from each extremity of which, a pulls 25 depends. Two main cables 26 extend rom a fixed connection 27 on the chassis 10 upward over the pulleys 25 and downward under fixed pulleys 28 ar posts of each frame are other as illustrated in ranged at'each side of the chassis secured to one of the angle bars 20. From the pulleys 28, the cables 26 again extend upward over third ulleys 29 carried at the top and each side o the outer :trame 19, and downward terminating yin a lower cross bar 30 at each side of the outer frame 19, as shown at 31.

body 12 and the cab 14, a i

air

Y cables, the Aelevati From cross bars 32 at each side of the Iouter frame 19, two secondary cables 33 extend. upward over a ried by an upper mem er V35 of the secondary frame 18. .From the sheaves 34, the secondary cables 33 extend downward to h a fixed connection at 36 von a lower member of the truss 16 supporting the elevating platform 15.

In operation, that ortion of the load which it is desired to e evate is placed upon the platform 15 and fluid pressure from the ower line 22 is turned into' the ram 21. 's causes the ram piston rod 23 to move u wardly, drawing on the maincables 26, w ich, slnce they are fixed at 27, will draw the secondary frame 18 u wardly. The movement of the secondary rame,V because of the fixed connection at 27, of the main cable 26, will be twice as great as the movement of the piston rod 23. 7

As the secondary frame moves upward, it will raise the sheaves 34 and draw npon the secondary cables 33 which, being fixed at 32, will raise the truss 16 and the elevating platform 15. Since this system of cables andsheaves is similar to that of the main platform will move upwardly twice the distance that the secondary frame 18 moves upwardly and correspond-A Jingly four times as far as the piston rod 23 moves upwardly.V lThe average lift for a A vehicle ram, such as'illustrated at 21, is approximately threefeet. This -ves a lift to vthe elevating platform 15 o twelve feet above the fioor 13, which is sufiicient for use in icing refrigerator cars.

When in the lowered osition, thelframe 17 and'18 will be entirely enclosed within, and protected by, the outer frame 19. The outer frame 19 is entirely enclosed within the truck body 12 so that the liabilityof injuring the mechanism by accident is remote. ile a specific formof the im rovemeiit has been described and illustrate herein, it is desired 4to be understood that the same may be varied, within the sco of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, what I claim and desire secured by Letters Patent isz- 1. The combination with an automobile chassis, of a series of four, up'ri ht, connected, angle posts fixed to said c assis; a second series of four, upright, connected, angle posts vertically slidable within saidl first series; athird series of four, u right, connectedZ angle posts vertically sljidable within said second series; a hydraulic ram carried'by said chassis; sheaves arranged to beraised bysad ram; second sheaves fixed below said ram; third sheaves carried adjacent the top of said'first series of upright posts; and a cable attached to said cliassis at air of sheaves 34 carv extremity and passing over said pair of sheave wheels one extremity and passing over said first sheaves to .a connection with said. second series;and a two to one cable and` sheave system between said second series and said first series.

2. The combination with an automobile chassis; of a series of four, upri ht, connected angle post-s fixed to said c assis; a second series of four, upright, connected angle posts vertically first series; a third series of four, upright, connected, angle posts vertically slidable vwithin said second'series; a hydraulic ram carried by said chassis; sheaves arranged to be raised by said ram; second sheaves fixed below said ram; third sheaves carried adjacent the top of said first series slidable within said` of upright posts; a cable attached to said chassis at one v first sheaves to a connection with said second series; secondary cables attached at one"`extremit to said first series and attheir other extremities to said third series; and sheaves for said secondary cables attached to and carried by said second seri 3. The combination p truck'body having a Hoor, of a fixed frame; a movable frame arranged to slide vertically in saidfixed frame and extend below said fioor; a second movable frame adapted to slide within said first movablel frame; a platform carried by said second movable frame and arranged to form a portion of said floor, when in one osition; means for elevating said movable rames, said means comprising Va hydraulic ram adapted to elevate a pair of with an automobiley sheaves; a second pair of sheave wheels Secured on opposite sides of. and adjacent the lower extremity of said fixed frame; a third secured on opposite sides and adjacent the top of said fixed and a pair of cables each fixed` at its one extremity to said body and adapted to extend over the sheave wheels at opposite sides of said body, the opposite extremities of said cables being secured to said movable frame -at'opposite sides thereof.

4. The combination with an automobile truck body having a floor of a fixed frame;

a movable frame arranged to slide vertically in said fixed frame and extend below said floor; a second movable frame adapted to slide within said first movable frame; a platform 'carried b said second movable rame and arrange to form aportion of said floor, when in onelposition; means for elevating said movable comprising a hydraulic ram adapted to elevate a palr of sheaves; a second pair of sheave wheels secured on opposite 'sides of and vadjacent the lower extremityof said fixed frame; a third pair of sheave wheels secured on opposite sidesand adjacent the top of said fixed frame;

frame los frames, said means and a pair of cables A each fixed at its one extremity to said body and adapted to extend' over the sheave wheels at opposite sides of said body, the opposite extremities of said cables being secured to said movable frame at opposite sides thereof; other sheave Wheels secured adjacent the top of said movable frame at opposite sides thereof; other cables arranged to pass over said other sheave Wheels and be secured at their one extremity to said fixed frame and at their other extremity to 10 said platform.

In testimony whereof, I affix my signature.

EARL J. KoFFoRD. 

